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ap18-chemistry-q4.pdf
Preview of Sample Responses Q4
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👤 Author: College Board
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Summary

The table provides molecular structures and boiling points for CS2 and COS. CS2 has a boiling point of 319 K, while COS has a boiling point of 223 K. The difference in boiling points is explained by the types and strengths of intermolecular forces in each compound. CS2 has only London dispersion forces, while COS has both London dispersion forces and dipole-dipole forces. However, the London dispersion forces in CS2 are stronger than the combination of forces in COS, resulting in a higher boiling point for CS2.

A 10.0 g sample of CS2 is vaporized in a 5.0 L rigid container at 325 K. The pressure in the container is calculated using the ideal gas law: p = nRT / V, where n is the number of moles of CS2 (0.131 mol), R is the gas constant, T is the temperature (325 K), and V is the volume (5.0 L). The calculated pressure is 0.70 atm.

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Description

The table provides molecular structures and boiling points for CS2 and COS. CS2 has a boiling point of 319 K, while COS has a boiling point of 223 K.

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  • File Format: PDF
  • File Size: 1.14 MB
  • Pages: 7
  • Language: EN
  • Author: College Board
  • Total Downloads: 204
  • Last Updated: 7 hours ago

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